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Mazyrski [523]
3 years ago
7

How to remember first 20 elements of the periodic table

Chemistry
2 answers:
Sav [38]3 years ago
6 0

If you can remember the phrase and know the symbols for the elements then you can memorize the order of the elements.

Hi! - H
He - He
Lies - Li
Because - Be
Boys - B
Can - C
Not - N
Operate - O
Fireplaces - F

New - Ne
Nation - Na
Might - Mg
Also - Al
Sign - Si
Peace - P
Security - S
Clause - Cl

A - Ar
King - K
Can - Ca


qwelly [4]3 years ago
4 0
There's a song on YouTube for all the elements of the periodic table
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List two general properties of molecular compounds
Katen [24]

Low melting points and boiling points. ...Low enthalpies of fusion and vaporization These properties are usually one or two orders of magnitude smaller than they are for ionic compounds.Soft or brittle solid forms. ...Poor electrical and thermal conductivity.
5 0
4 years ago
Answer ASAP 50 pts
Oduvanchick [21]

Answer:

Loss of reactants through transfer

Explanation:

Reactants can be lost a little when being transferred by human error

8 0
3 years ago
Read 2 more answers
Each step in the following process has a yield of 90.0 %. CH 4 + 4 Cl 2 ⟶ CCl 4 + 4 HCl CCl 4 + 2 HF ⟶ CCl 2 F 2 + 2 HCl The CCl
Rainbow [258]

Answer:

4.86 moles of HCl

Explanation:

1. First write the balanced chemical equations involved in the process:

CH_{4}+_4Cl_{2}=CCl_{4}+_4HCl

CCl_{4}+_2HF=CCl_{2}+F_{2}+_2HCl

2. Calculate what amount of CCl_{4} is formed in the first reaction.

3.00molesCH_{4}*\frac{1molCCl_{4}}{1molCH_{4}}=3.00molesCCl_{4}

As the yield of each reaction is 90.0%, the amount of CCl_{4} produced is the following:

3.00molesCCl_{4}*0.90=2.7molesCCl_{4}

3. Calculate the amount of HCl produced.

2.7molesCCl_{4}*\frac{2molHCl}{1molCCl_{4}}=5.4molesHCl

The total amount of HCl produced with a 90.0% yield is:

5.4molesHCl*0.90=4.86molesHCl

4 0
3 years ago
An atom of aluminum in the ground state and an atom of gallium in the ground state have the same
Kobotan [32]
(4) total number of valence electrons, because they exist in the same group.
3 0
4 years ago
True or false?<br><br> In order for an ionic bond to form, there needs to be a cation and an anion.
olya-2409 [2.1K]

Answer:

True  

Step-by-step explanation:

An ionic bond is the attraction between a cation and an anion.

If there is no cation or anion, there is no ionic bond.


6 0
4 years ago
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